MAP significa Manifold Absolute Pressure Sensor, ou, Sensor de pressão Absoluta do Coletor de Admissão. Ele converte a pressão do ar que entra no motor em sinais elétricos. Certamente esses sinais são repassados à ECU do automóvel, tais números são essenciais para a injeção é a função do Sensor MAP?No cofre do motor, o MAP fica no coletor da admissão. Imediatamente, com a passagem de ar, é medida a pressão, que quando computada corretamente, otimiza a mistura ar-combustível no interior dos motores. Um Sensor MAP com defeito dificulta o trabalho do motor. Por isso o MAP é tão importante para o bom funcionamento do e conheça os tipos de Vela de Ignição Segundo a Gauss, uma das referências em sensores MAP do mercado, “com a informação da altitude, da pressão no coletor de admissão e da temperatura do ar, a central calcula exatamente a quantidade de oxigênio que está entrando nos cilindros, e consequentemente, injeta a quantidade ideal de combustível, para manter estável a razão estequiométrica, ou seja, a relação ar/combustível.”Só para exemplificar, esta é a localização do sensor MAP na admissão de um motor boxer 4 cilindros de SubaruQuais sintomas de defeito no sensor MAP?Uma das perguntas mais frequentes que recebemos é como saber se o sensor map está com defeito. Em virtude dos defeitos, é comum identificar problemas no MAP observando os seguintes pontosluz da injeção acesa no painel do veículomaior volume de gases sujeito a reprovação no exame de emissõesmaior consumo de combustível e queima incompletaproblemas de aceleração, como trepidação ou resposta demoradacheiro de gás com motor em funcionamento excesso de combustívelComo saber se o sensor MAP está funcionando?À medida que a peça é exigida, existem três pontos que devem ser verificados, Apesar disso, manter um sensor MAP é muito simples. Portanto tais cuidados são essenciais na saúde do de medição intacta e desobstruída para leitura corretafiação e pinos intactos evitam curto-circuitos e mantém o fluxo de eletricidade sensor funcionando e com correnteVerificados estes três pontos do sensor map, é possível fazer a análise física do funcionamento do sensor. Usar uma pistola a vácuo e um medidor de tensão, ou um scanner de varredura, ajudam a aferir o sensor MAP. Caso algum item não esteja conforme, é preciso substituir o você tenha alguma dúvida em relação ao funcionamento, é só nos chamar na caixinha dos causa da injeção eletrônica, muitos veículos atuam com o controle de um Sensor MAPComo manter sempre limpos?Alguns sintomas surgem quando o sensor está sujo ou com baixo rendimento. Sensor map sujo traz alto consumo, falta de força, luz da injeção acesa, ou funcionamento irregular e hesitação com atraso na aceleração são alguns deles. Para realizar uma limpeza preventiva é muito simples, e fazer isso, já traz o normal funcionamento do sensor de tudo, solte o sensor da admissão um ou dois parafusosem seguida remova o conector da base do sensorentão passe spray para limpeza álcool isopropílico ou WD-40agora é só fixar o sensor novamente à admissão e parafusar com cuidadologo depois reconecte a fiação à base do sensorPrecisando de sensor, compra na AutoNext!Rode a plena potência com economia e segurança. Ainda mais com toda linha MAP da AutoNext, uma solução segura e rápida para quem busca os melhores comprando conosco você tem benefícios comoAtendimento via fone e WhatsappDiversas categorias para atender suas necessidadesProdutos originais de marcas referência no mercadoCompra segura e transparente com informações completasFrete Grátis para Sul e Sudeste5% de desconto no boleto ou PIX Ficou interessado? Confira nosso site.
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| Вуклቫπիքገ կ ጏլимыճывсի | Уζ ηቄкоքεтвε |
Manifold Absolute Pressure Sensor, referred to as MAP sensor. The MAP sensor is an indirect air flow meter, and its signal is one of the important signals for the basic fuel injection control of the IntroductionⅡ Working principleⅢ Internal structureⅣ Types of MAP sensor1. Semiconductor varistor MAP sensor2. Capacitive MAP sensorⅤ Output characteristicsⅠ Introduction Manifold Absolute Pressure Sensor, referred to as MAP sensor. The MAP sensor is an indirect airflow meter, and its signal is one of the important signals for the basic fuel injection control of the engine. It is connected to the intake manifold with a vacuum tube. With different engine speed loads, it senses the vacuum change in the intake manifold and then converts the change in the internal resistance of the sensor into a voltage signal for the ECU to correct the fuel injection the electronic fuel injection engine, the MAP sensor is used to detect the intake air volume is called the D-type injection system speed density type. The MAP sensor detects the intake air volume not directly like the intake airflow sensor but uses indirect detection. At the same time, it is also affected by many factors, so there are many differences in the detection and maintenance of the intake airflow from the volume Working principleThe MAP sensor detects the absolute pressure of the intake manifold behind the throttle. It detects the absolute pressure change in the manifold according to the engine speed and load, and then converts it into a signal voltage and sends it to the engine control unit ECU. The ECU controls the basic fuel injection volume according to the signal are many types of MAP sensors, including varistor type and capacitive type. Because the varistor type has the advantages of fast response time, high detection accuracy, small size, and flexible installation, it is widely used in D-type injection 1Figure 2Figure 1 shows the connection between the varistor type MAP sensor and the computer. Figure 2 is the working principle of the varistor type MAP sensor. The R in Figure 1 is the strain resistance R1, R2, R3, R4 in Figure 2. They form a Wheatstone bridge and are bonded to the silicon diaphragm together. The silicon diaphragm can be deformed under the action of the absolute pressure in the manifold, which causes the resistance value of the strain resistor R to change. The higher the absolute pressure in the manifold, the greater the deformation of the silicon diaphragm and the greater the resistance change of the resistance R. That is, the mechanical change of the silicon diaphragm is converted into an electrical signal, which is then amplified by the integrated circuit and output to the Internal structureThe pressure sensor uses a pressure chip for pressure measurement, and the pressure chip integrates a Wheatstone bridge on a silicon diaphragm that can undergo pressure deformation. The pressure chip is the core of the pressure sensor. All major manufacturers of pressure sensors have their own pressure chips. Some are directly produced by sensor manufacturers, some are dedicated chips ASC produced by outsourcing, and the other is to directly purchase general-purpose chips from professional chip manufacturers. Chips directly produced by sensor manufacturers or customized ASC chips are generally only used in their own products. Such chips are highly integrated, often using pressure chips, amplifying circuits, signal processing chips, EMC protection circuits, and those used to calibrate sensor output curves. ROM is integrated on a chip, the whole sensor is a chip, and the chip is connected to the PIN pin of the connector through a lead. Figure 3. The internal structure of the pressure sensor based on MEMS technologyThe pressure sensor as shown in Figure 3 integrates other processing circuits except for the sensor chip into the circuit chip, and some pressure sensor manufacturers completely integrate the two into design and production process of pressure sensors is actually the practical application of MEMS technology abbreviation of microelectromechanical systems. MEMS is based on 21st-century cutting-edge technology based on micro/nanotechnology. It is the technology of designing, processing, manufacturing, and controlling micro/nano materials. It can integrate mechanical components, optical systems, drive components, electrical control systems, and digital processing systems into a microsystem that is an integral unit. This kind of microelectronic mechanical system can not only collect, process, and send information or instructions, but also take actions according to the acquired information autonomously or according to external instructions. It uses a combination of microelectronics technology and micromachining technology including silicon body micromachining, silicon surface micromachining, LIGA and wafer bonding, etc. to produce a variety of excellent performance, low price, miniaturized sensors, execution devices, drives, and microsystems. MEMS emphasizes the use of advanced technology to realize microsystems and highlights the ability of integrated pressure sensor is a typical representative of MEMS technology, and another commonly used MEMS technology is the microelectromechanical gyroscope. Several major EMS system suppliers, such as BOSCH, DENSO, CONTI, and other companies, have their own dedicated chips designed with similar structures. Advantages high integration, small sensor size, the small size of the sensor with small-size connectors, easy to arrange and install. The pressure chip inside the sensor is completely encapsulated in silica gel, which plays the role of corrosion resistance and vibration resistance, which greatly improves the service life of the sensor. Large-scale mass production has low cost, high yield, and excellent other manufacturers of MAP sensors use general-purpose pressure chips and then integrate the pressure chip, EMC protection circuit, and other peripheral circuits and connector PIN pins through the PCR board. As shown in Figure 4, the pressure chip is mounted on the back of the PCB. The PCB is a Double-sided PCB board. Figure 4. Use PCB board to integrate chips and circuitsDue to the low integration level of this type of pressure sensor, the cost of manufacturing materials is high. The PCB board does not have a fully-sealed package, and the parts are integrated on the PCB board through the traditional soldering process, and there is a risk of virtual soldering. In an environment of high vibration, high temperature, and high humidity, PCB should be Types of MAP sensorThe MAP sensor converts the pressure of the engine's intake pipe into a corresponding electrical signal. The engine electronic controller calculates the basic fuel injection time and determines the basic ignition advance angle based on this signal. Pressure sensors come in many forms. According to the principle of signal generation, they can be divided into piezoelectric, semiconductor varistor, capacitive, differential transformer, and surface elastic wave Semiconductor varistor MAP sensor1 Measuring principle of semiconductor varistor pressure sensorThe semiconductor varistor pressure sensor uses the piezoresistive effect of semiconductors to convert pressure into a corresponding voltage signal, and its principle is shown in Figure 5. Figure 5. Measuring principle of semiconductor varistor pressure sensorThe semiconductor strain gauge is a sensitive element whose resistance value changes correspondingly when under tension or pressure. Attach the strain gauges to the silicon diaphragm and connect them to a Wheatstone bridge. When the silicon diaphragm is deformed by force, each strain gauge is pulled or compressed and its resistance changes and the bridge will have a corresponding voltage output.2 Structure of varistor MAP sensorThe composition of the semiconductor varistor MAP sensor is shown in Figure 6. There is a silicon diaphragm in the pressure conversion element of the sensor, and the pressure and deformation of the silicon diaphragm will generate a corresponding voltage signal. One side of the silicon diaphragm is vacuum, and the other side introduces the pressure of the intake pipe. When the pressure in the intake pipe changes, the deformation of the silicon diaphragm will change accordingly, and a voltage signal corresponding to the intake pressure is generated. The greater the intake pressure, the greater the deformation of the silicon diaphragm, and the greater the output pressure of the sensor. Figure 6. Structure of varistor MAP sensorThe semiconductor varistor MAP sensor has good linearity and has the advantages of small structure size, high precision and good response Capacitive MAP sensor1 Measuring principle of a capacitive MAP sensorThe capacitive pressure sensor uses a diaphragm to form a pressure-sensitive element with a variable capacitance. When the diaphragm is deformed by force, its capacitance changes accordingly. The sensor measuring circuit converts the capacitance change corresponding to the pressure into a corresponding electrical signal. Capacitive pressure sensor measurement circuits mainly have two types frequency detection and voltage detection, as shown in Figure 7. Figure 7. Measuring principle of the capacitive MAP sensor1 Frequency detection type The oscillating frequency of the oscillating circuit changes with the change of the capacitance value of the pressure sensitive element, and the pulse signal whose frequency corresponds to the pressure is output after rectification and Voltage detection type the change of the capacitance value of the pressure sensitive element is modulated by the carrier and AC amplifier circuit, demodulated by the detector circuit, and filtered by the filter circuit to output a voltage signal corresponding to the pressure change.2 The structure of the capacitive MAP sensorThe schematic diagram of the capacitive MAP sensor is shown in Figure 8. The aluminum oxide diaphragm and the hollow insulating medium form a capacitive pressure sensitive element with a vacuum inside, which is connected to the sensor hybrid integrated circuit. After the sensor introduces the pressure of the intake pipe, the aluminum oxide diaphragm deforms under the action of the intake pressure, causing its capacitance value to change. After processing by the hybrid integrated circuit, it outputs an electrical signal corresponding to the change in the intake 8. Structure of capacitive MAP sensorCompared with the intake airflow sensor that plays the same role, the MAP sensor has no interference to the air intake, and the installation position is flexible the MAP sensor can be installed far away from the engine intake pipe using the guidance of the vacuum tube. Therefore, the use of MAP sensors in modern engine electronic control systems is Output characteristicsWhen the engine is working, as the throttle opening changes, the vacuum, absolute pressure and output signal characteristic curve in the intake manifold are all 9. MAP sensorThe D-type injection system detects the absolute pressure in the intake manifold behind the throttle. The rear of the throttle reflects both the vacuum degree and the absolute pressure. Therefore, some people think that the vacuum degree and absolute pressure are the same concepts, but this understanding is one-sided. Under the condition of constant atmospheric pressure standard atmospheric pressure is the higher the vacuum in the manifold, the lower the absolute pressure in the manifold. The vacuum is equal to the atmospheric pressure minus the absolute pressure in the manifold. The higher the absolute pressure in the manifold, the lower the vacuum in the manifold. The absolute pressure in the manifold is equal to the atmospheric pressure outside the manifold minus the vacuum. That is, atmospheric pressure is equal to the sum of vacuum and absolute pressure. After understanding the relationship between atmospheric pressure, vacuum, and absolute pressure, the output characteristics of the MAP sensor are engine operation, the smaller the throttle opening, the greater the vacuum of the intake manifold, the smaller the absolute pressure in the manifold, and the smaller the output signal voltage. The greater the throttle opening, the smaller the vacuum of the intake manifold, the greater the absolute pressure in the manifold, and the greater the output signal voltage. The output signal voltage is inversely proportional to the vacuum in the manifold and proportional to the absolute pressure in the ArticlesWhat is a Piezoelectric Sensor?Introduction to Wireless Sensor Networks
MAP Manifold Absolute Pressure - Masih banyak pengemudi yang belum memahami fungsi dari komponen pada mesin motor injeksi yang digunakan sehari-hari. Dapat dipahami bahwa dan dibandingkan dengan motor jenis karburator, motor injeksi memiliki komponen baru berupa elektronik dengan fungsinya masing-masing yang berbeda. Salah satu komponen elektronik motor injeksi adalah MAP Sensor atau Manifold Absolute Pressure Sensor. Biar kita tidak bingung yuk mari belajar bersama mengenai komponen MAP MANIFOLD ABSOLUTE PRESSURE SENSORManifold Absolute Pressure disingkat MAP, fungsinya untuk mengukur tekanan di intake manifold, kemudian mengirimkan sinyal tegangan yang dikirim ke ECU. Sensor MAP hanya bekerja jika ada tekanan udara luar di intake yang berarti komponen ini hanya bekerja pada langkah hisap. Oleh karena itu, ECU menggunakan MAP untuk menandai langkah masuk dan berfungsi sebagai referensi untuk sinyal kalibrasi MAP mendeteksi atau mengukur jumlah udara yang mengalir melalui valve throttle valve di throttle body berdasarkan kevakuman yang dihasilkan di intake manifoldMAP Manifold Absolute Pressure digunakan pada mesin yang menggunakan sistem injeksi D-EFI. Sedangkan MAF Mass Air Flow Sensor dapat ditemukan pada mesin yang menggunakan sistem injeksi tipe L-EFI. MAP Manifold Absolute Pressure berbeda dengan sensor MAF Mass Air Flow Sensor. Namun fungsi kedua sensor ini hampir sama, yakni mengukur jumlah udara yang terdeteksi. Sehingga mengakibatkan campuran antara udara dan bahan bakar mencapai kondisi MAP terdiri dari tiga terminal dan selang vakum. Selang vakum sensor MAP terhubung ke ruang intake manifold, dan tiga terminal kabel meliputiTerminal VC Terminal yang mendapatkan tegangan input atau sinyal dari ECU saat kunci kontak dihidupkan, tegangannya adalah 5 volt. Terminal PIM digunakan sebagai terminal output sinyal dari sensor MAP. Nilai tegangan akan bervariasi sesuai dengan kevakuman manifold, dan tegangan keluaran akan dikirim kembali ke ECU sebagai input data oleh E2 Digunakan sebagai terminal massa atau ground dari sensor KERJA MAP MANIFOLD ABSOLUTE PRESSURE SENSORPerhatikan gambar dibawah ini!Tugas dari sensor MAP adalah mengukur tekanan udara di intake manifold melalui selang vakum yang dihubungkan antara sensor MAP dan intake manifold. Vakum di intake manifold terjadi saat mesin dihidupkan, dan nilai vakum berubah saat pedal gas ditekan tergantung pada bukaan throttle.Terdapat komponen silicon chip di dalam sensor MAP, yang dapat mengubah resistansi sesuai dengan tekanan udara dari intake manifold. Satu sisi chip silikon terhubung ke tekanan udara manifold intake, dan sisi lainnya terhubung ke ruang di ruang vakum akan tetap konstan, sedangkan tekanan di intake manifold akan berubah. Perubahan tekanan pada intake manifold akan menyebabkan perubahan bentuk pada chip silikon. Nilai resistansi pada chip silikon juga berubah sesuai dengan tingkat perubahan tekanan. Tegangan sinyal dari ECU akan masuk ke terminal VC, yaitu 5 volt. Tegangan ini akan mengalir melalui chip silikon. Jika resistansi pada chip silikon lebih besar, tegangan yang melewatinya akan lebih kecil. Tegangan yang melewati chip silikon akan dikirim ke terminal PIM dan kemudian ke ada masalah pada sensorKetika ada masalah dengan sensor MAP, maka indikator MIL Malfunction Indicator Lamp atau lampu check engine pada dashboard akan menyala secara otomatis. Pada kondisi normal, lampu check engine akan menyala ketika kunci kontak ON mesin mati, dan normalnya lampu akan mati kembali ketika mesin telah hidup, namun apabila lampu check engine ini tetap menyala saat mesin menyala maka menandakan ada masalah pada menentukan apakah kerusakan yang disebabkan oleh sensor MAP atau bukan dengan alasan lain diperlukan, diperlukan alat scan atau scan tool.0u5CSs.
cara manipulasi map sensor
